Generate Random Prime Numbers
Quickly create a list of random primes from a specific interval. Runs entirely in your browser, so your data never leaves your device.
Output
The result appears here as you type.
How to use Generate Random Prime Numbers
- 1. Set count and interval. Enter How many primes, then set Interval minimum and Interval maximum to bound the range the tool searches for prime candidates.
- 2. Understand the selection. The tool tests candidates in your interval for primality and randomly picks the requested count from the ones that pass, so results vary between runs even with the same range.
- 3. Choose a separator. Set Separator to a comma or newline so the primes paste cleanly into a spreadsheet, script or worksheet.
- 4. Copy the primes. Copy the generated prime numbers into a cryptography demo, math worksheet or random-selection test fixture.
When to use Generate Random Prime Numbers
Generate Random Prime Numbers picks a random sample of primes from within an interval you set, rather than listing every prime in order. Use this tool when you need a scattered handful of primes for a demo or worksheet instead of the full sequential list.
- Building a prime-spotting quiz. A math worksheet asks students to identify which numbers in a mixed list are prime, so a handful of random primes up to 1000 gets mixed in with composite numbers as distractors.
- Demoing RSA key concepts at small scale. An introductory cryptography lesson wants small random primes under 100 to walk through a toy RSA key generation example without the complexity of real cryptographic-size primes.
- Sampling test inputs for a primality checker. A unit test suite for a primality-testing function wants a randomized set of known primes within a range to confirm the function returns true across varied magnitudes.
Examples
Ten random primes up to 1000
Output
7, 641, 89, 2, 199, 467, 3, 829, 113, 571
Five random primes between 100 and 200
Output
101, 197, 139, 163, 107
About the Generate Random Prime Numbers tool
Generate Random Prime Numbers is a free online tool that works entirely inside your web browser. Quickly create a list of random primes from a specific interval. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 194 Number utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with 4 settings, including How many primes, Interval minimum, Interval maximum and Separator, and the result refreshes the moment you change one. 2 worked examples further down the page show exactly what the tool produces for real inputs.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Is Generate Random Prime Numbers free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Does the generator send anything to a server?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How do I get a different result?
Run the generator again. Each run is computed fresh on your device, and any options you change are applied to the next result immediately.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.